A base station forms a communication area enabling communication with a mobile communication network through a local network that includes the base station. The base station includes a monitoring unit that monitors an address for data communication with the mobile communication network and assigned to a mobile terminal in the communication area; a storage unit that stores combination information indicating a combination of the address monitored and identification information of the mobile terminal; a receiving unit that receives, from a communication terminal in the local network, data having the identification information; a comparing unit that compares the combination information with a combination of a destination address of the data and the identification information in the data; and a transmitting unit that transmits the data to the mobile terminal if the combination and the combination information coincide, and performs error processing if the combination and the combination information do not coincide.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A base station that forms a communication area enabling communication with a mobile communication network through a local network that includes the base station, the base station comprising: a monitoring unit that monitors an address assigned to a mobile terminal in the communication area, the address being assigned by the mobile communication network for data communication with the mobile communication network; a storage unit that stores combination information indicating a combination of the address monitored at the monitoring unit and identification information of the mobile terminal; a receiving unit that receives, from a communication terminal in the local network, data having the identification information; a comparing unit that compares the combination information stored in the storage unit with a combination of a destination address of the data and the identification information that is included in the data received by the receiving unit; and a transmitting unit that transmits, to the mobile terminal, the data received by the receiving unit when a result of comparison by the comparing unit indicates that the combination of the destination address and the identification information and the combination information coincide, and performs error processing when the result of comparison indicates that the combination of the destination address and the identification information and the combination information do not coincide.
A base station facilitates communication between a local network and a mobile communication network. It monitors the mobile network-assigned address of a mobile terminal within its coverage area. The base station stores a combination of this address and the mobile terminal's ID. When data arrives from a local network communication terminal containing a mobile terminal ID, the base station compares the destination address of the data AND the mobile terminal ID against the stored address and ID combination. If they match, the data is forwarded to the mobile terminal. If they don't match, an error handling process is initiated.
2. The base station according to claim 1 , wherein the transmitting unit, in performing the error processing, informs the communication terminal that the destination address of the received data is invalid.
In the base station described above, the error handling process involves informing the communication terminal that sent the data that the destination address is invalid. The base station sends an error message back to the communication terminal indicating that the address used in the data transmission is not recognized as a valid address for the intended mobile terminal within the local network.
3. The base station according to claim 1 , wherein the transmitting unit, in performing the error processing, provides the communication terminal with an address that, in the combination information, is combined with the identification information included in the data received.
In the base station described above, the error handling process involves providing the communication terminal with the correct address associated with the mobile terminal ID included in the received data, retrieved from the stored address and ID combinations. The base station essentially corrects the sender's address information, offering the right destination address for that particular mobile terminal.
4. The base station according to claim 3 , wherein the receiving unit receives data transmitted from the communication terminal addressed to the address provided to the communication terminal by the transmitting unit, and the transmitting unit transmits to the mobile terminal, the data that is received by the receiving unit and addressed to the address provided to the communication terminal by the transmitting unit.
In the base station that corrects the sender's address, when the communication terminal resends the data to the corrected address provided by the base station, the base station then transmits this data onward to the intended mobile terminal. The corrected address is now used for successful transmission.
5. The base station according to claim 1 , wherein the transmitting unit, in performing the error processing, transmits notification instruction to the mobile terminal, the notification instruction instructing to provide the communication terminal with an address that, in the combination information, is combined with the identification information included in the data received.
In the base station described above, the error handling process involves sending a notification to the mobile terminal, instructing it to provide the communication terminal (the original sender) with the correct address that is associated with its ID. The base station asks the mobile terminal to assist the sender.
6. The base station according to claim 5 , wherein the receiving unit receives data that is transmitted from the communication terminal addressed to the address provided to the communication terminal by the mobile terminal as a result of transmission of the notification instruction by the transmitting unit, and the transmitting unit transmits, to the mobile terminal, the data that is received by the receiving unit and addressed to the address provided to the communication terminal by the transmitting unit.
In the base station that instructs the mobile terminal to correct the sender, if the communication terminal resends the data to the mobile terminal's correct address (provided by the mobile terminal), then the base station forwards this data to the mobile terminal. The mobile terminal facilitates correct address exchange.
7. The base station according to claim 1 , further comprising a processor unit configured to, when the result of comparison indicates that the combination of the destination address and the identification information and the combination information do not coincide, change the destination address of the data to an address that, in the combination information, is combined with the identification included in the data received by the receiving unit, wherein the transmitting unit, in performing the error processing, transmits to the mobile terminal, the data whose address has been changed by the processor unit.
In the base station described above, when the destination address and ID combination doesn't match, the base station changes the destination address of the incoming data to the correct address corresponding to the included mobile terminal ID (retrieved from the stored combinations). Then, as part of error processing, the base station sends this modified data to the mobile terminal.
8. The base station according to claim 1 , further comprising: a request receiving unit that, prior to reception of the data, receives a communication-path establishment request from the communication terminal to the mobile terminal; and a processor unit configured to establish transmission control protocol connection between the mobile terminal and the communication terminal, the mobile terminal being an intended recipient of the communication-path establishment request received by the request receiving unit, wherein the receiving unit receives data that is transmitted from the communication terminal as a result of the transmission control protocol connection being established by the processor unit.
The base station first receives a communication-path establishment request from a communication terminal targeting a mobile terminal. The base station then establishes a TCP (Transmission Control Protocol) connection between the communication terminal and the intended mobile terminal. The base station receives data from the communication terminal *after* this TCP connection has been successfully established.
9. The base station according to claim 8 , wherein the processor unit, when the result of comparison by the comparing unit indicates that the combination of the destination address and the identification information and the combination information do not coincide, terminates the transmission control protocol connection and establishes a transmission control protocol connection between the communication terminal and a mobile terminal having the address that is combined with the identification information included in the data received by the receiving unit.
In the base station that establishes TCP connections, if the received data's destination address and ID combination don't match, the base station terminates the existing TCP connection between the communication terminal and the originally targeted mobile terminal. Then, it establishes a *new* TCP connection between the communication terminal and the mobile terminal with the *correct* address associated with the ID in the data.
10. The base station according to claim 1 , further comprising: a request receiving unit that, prior to reception of the data, receives a communication-path establishment request from the communication terminal to the mobile terminal; and a processor unit configured to terminate a transmission control protocol connection between the communication terminal and the mobile terminal based on the communication-path establishment request received by the request receiving unit, and establishes a transmission control protocol connection with the communication terminal, wherein the receiving unit receives data that is transmitted from the communication terminal as a result of the transmission control protocol connection being established by the processor unit.
The base station receives a communication-path establishment request from a communication terminal to a mobile terminal. Upon receiving this request, the base station terminates any existing TCP connection between the communication terminal and the targeted mobile terminal. The base station then establishes a *new* TCP connection with the communication terminal *itself*. The data is then received from the communication terminal via this newly established connection.
11. The base station according to claim 10 , further comprising a processor unit configured to, when the result of comparison indicates that the combination of the destination address and the identification information and the combination information do not coincide, changes the destination address of the data to an address that, in the combination information, is combined with the identification included in the data received by the receiving unit, wherein the transmitting unit, in performing the error processing, transmits to the mobile terminal, the data whose address has been changed by the processor unit.
The base station terminates and re-establishes TCP connections and checks the data's destination as above. If the address and ID combination does not match, it modifies the destination address of the data to the correct address paired with the received mobile terminal ID. During error processing, the base station sends this address-corrected data to the mobile terminal.
12. A data transfer method of a base station that forms a communication area enabling communication with a mobile communication network through a local network that includes the base station, the data transfer method comprising: monitoring an address assigned to a mobile terminal in the communication area, the address being assigned by the mobile communication network for data communication with the mobile communication network; storing combination information indicating a combination of the address monitored by the monitoring unit and identification information of the mobile terminal; receiving, from a communication terminal in the local network, data having the identification information; comparing the combination information stored at the storing with a combination of a destination address of the data and the identification information that is included in the data received; transmitting the data received at the receiving to the mobile terminal when a result of comparison at the comparing indicates that the combination of the destination address and the identification information and the combination information coincide; and performing error processing when the result of comparison at the comparing indicates that the combination of the destination address and the identification information and the combination information do not coincide.
A data transfer method for a base station involves these steps: monitor addresses assigned to mobile terminals; store combinations of these addresses and their IDs; receive data from a communication terminal containing a mobile terminal's ID; compare the data's destination address and ID with the stored combinations; transmit the data to the mobile terminal if they match; and perform error processing if the address and ID combination doesn't match. The error process handles incorrect addresses.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
May 19, 2009
July 2, 2013
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